Salton Sea Projects Improvements Act This bill provides the Bureau of Reclamation with additional project authorities for the Salton Sea research project in Southern California. Specifically, the bill authorizes Reclamation to provide grants and enter into contracts and cooperative agreements to carry out projects (e.g., construction activities and dust suppression projects) to improve air quality, fish and wildlife habitat, recreational opportunities, and water quality in the area of the Salton Sea. To carry out these projects, Reclamation may enter into partnerships with state, tribal, and local governments; water districts; joint powers authorities, including the Salton Sea Authority; nonprofit organizations; and institutions of higher education.